Display device and method for manufacturing a display device

Abstract

Embodiments of the present application provide a display device and a manufacturing method thereof. The display device comprises a display screen body, an optical adhesive layer, a cover plate and a reinforcing portion. The optical adhesive layer is arranged on the display side of the display screen body. The optical adhesive layer comprises a middle portion and an edge portion arranged on the circumferential side of the middle portion perpendicular to a first direction. The cover plate is bonded to the display side of the display screen body through the optical adhesive layer. At least part of the reinforcing portion is embedded in the edge portion of the optical adhesive layer. In a direction away from the middle portion, the thickness of the reinforcing portion along the first direction gradually increases. The hardness of the material of the reinforcing portion is greater than the hardness of the material of the optical adhesive layer. The reinforcing portion guides the deformation direction of the optical adhesive layer to concentrate on the middle region, reduces the shear stress concentration of the edge portion, improves the shear resistance of the edge portion, thereby reducing the risk of air bubbles caused by peeling between the optical adhesive layer and the cover plate, improving the waterproof performance of the display device, and improving the use performance of the display device.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a display device and a method for manufacturing the display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] However, the performance of current display products needs to be improved. Summary of the Invention

[0004] This application provides a display device and a method for manufacturing the display device, aiming to improve the performance of the display device.

[0005] An embodiment of the first aspect of this application provides a display device, including: a display screen body, an optical adhesive layer, a cover plate, and a reinforcing portion. The display screen body includes a display side and a non-display side disposed opposite each other along a first direction. The optical adhesive layer is disposed on the display side of the display screen body, and the optical adhesive layer includes a middle portion and an edge portion disposed on the peripheral side of the middle portion perpendicular to the first direction. The cover plate is disposed on the side of the optical adhesive layer away from the display screen body, and the cover plate is bonded to the display side of the display screen body through the optical adhesive layer. At least a portion of the reinforcing portion is fitted into the edge portion of the optical adhesive layer, and the orthographic projection of the reinforcing portion on the cover plate at least partially overlaps with the orthographic projection of the edge portion on the cover plate. The reinforcing portion is disposed on at least one side of the middle portion perpendicular to the first direction, and the thickness of the reinforcing portion gradually increases along the first direction in the direction away from the middle portion. The hardness of the material of the reinforcing portion is greater than the hardness of the material of the optical adhesive layer.

[0006] According to an embodiment of this application, a reinforcing portion is disposed on the periphery of the middle portion along a direction perpendicular to the first direction.

[0007] According to an embodiment of this application, the display screen body includes a display area and a non-display area disposed on the periphery of the display area along a direction perpendicular to the first direction, and the orthographic projection of the reinforcing part on the cover plate is spaced apart from the orthographic projection of the display area on the cover plate.

[0008] According to an embodiment of this application, the reinforcing portion is disposed on the edge portion facing the display screen body.

[0009] According to an embodiment of this application, the reinforcing part includes a first surface facing the side of the display body, and the first surface is disposed in contact with the display body.

[0010] According to an embodiment of this application, the reinforcing portion further includes a second surface on the side away from the middle portion and a first inclined surface connected between the first surface and the second surface. The first inclined surface is bonded to the optical adhesive layer and is inclined in the direction away from the middle portion along the direction close to the cover plate.

[0011] According to an embodiment of this application, the second surface is parallel to the first direction, and the orthographic projection of the edge portion on the cover plate overlaps with the orthographic projection of the reinforcing portion on the cover plate.

[0012] According to an embodiment of this application, the edge portion is located on both sides of the reinforcing portion along the first direction.

[0013] According to an embodiment of this application, the reinforcing portion includes a second inclined surface facing one side of the cover plate, and the second inclined surface is inclined in a direction away from the middle portion along the direction close to the cover plate.

[0014] According to an embodiment of this application, the reinforcing portion further includes a third inclined surface facing the side of the display screen body, and the third inclined surface is inclined in a direction away from the middle portion along the direction close to the display screen body.

[0015] According to an embodiment of this application, the reinforcing portion further includes a third surface on the side opposite to the middle portion. The third surface is connected between the second inclined surface and the third inclined surface. The third surface is parallel to the first direction, and the orthographic projection of the edge portion on the cover plate overlaps with the orthographic projection of the reinforcing portion on the cover plate.

[0016] According to an embodiment of this application, a polarizer is provided on the side of the display screen facing the optical adhesive layer and the reinforcing portion.

[0017] According to embodiments of this application, the material of the reinforcing part includes at least one of glass, plastic, or organic adhesive.

[0018] According to the embodiments of this application, the Young's modulus of the reinforcing portion is greater than the Young's modulus of the optical adhesive layer.

[0019] An embodiment of the second aspect of this application also provides a method for manufacturing a display device, comprising:

[0020] An optical adhesive layer and a reinforcing portion are formed on the display side of the display body along the first direction. The optical adhesive layer includes a middle portion and an edge portion disposed on the peripheral side of the middle portion perpendicular to the first direction. At least a portion of the reinforcing portion is fitted into the edge portion of the optical adhesive layer. Along the direction away from the middle portion, the thickness of the reinforcing portion gradually increases along the first direction. The hardness of the material of the reinforcing portion is greater than the hardness of the material of the optical adhesive layer.

[0021] The cover plate is attached to the side of the optical adhesive layer away from the display screen body.

[0022] According to an embodiment of this application, the step of forming an optical adhesive layer and a reinforcing portion on the display side of the display body along a first direction includes:

[0023] A reinforcing section is formed on the display side of the display screen body;

[0024] An optical adhesive layer is formed on the display side of the display body and on the side of the reinforcing part away from the display body.

[0025] According to an embodiment of this application, the step of forming an optical adhesive layer and a reinforcing portion on the display side of the display body along a first direction includes:

[0026] A first sub-adhesive layer is formed on the display side of the display screen body;

[0027] A reinforcing section is formed on the side of the first sub-adhesive layer away from the display screen body;

[0028] A second sub-adhesive layer is formed on the side of the first sub-adhesive layer and the reinforcing portion away from the display screen body. The first sub-adhesive layer and the second sub-adhesive layer constitute an optical adhesive layer.

[0029] In embodiments of this application, at least a portion of the reinforcing portion is fitted into the edge of the optical adhesive layer, thereby reducing the influence of the reinforcing portion on the thickness of the display device along the first direction. The hardness of the material of the reinforcing portion is greater than that of the material of the optical adhesive layer. The reinforcing portion is disposed on at least one side of the middle portion perpendicular to the first direction. Along the direction away from the middle portion, the thickness of the reinforcing portion gradually increases along the first direction. When the display device is subjected to pressure, the reinforcing portion guides the deformation direction of the optical adhesive layer to concentrate towards the middle region, reducing the concentration of shear stress at the edge, improving the shear resistance of the edge, thereby reducing the risk of bubbles forming due to peeling between the optical adhesive layer and the cover plate, improving the waterproof performance of the display device, and improving the usability of the display device. Attached Figure Description

[0030] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0031] Figure 1 This is a partial structural diagram of a display panel provided in an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the structure of a reinforcing part of a display panel provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0035] Figure 5This is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of a manufacturing process for a display panel provided in an embodiment of this application;

[0037] Figure 7 This is a flowchart of another method for manufacturing a display panel provided in an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of another method for manufacturing a display panel provided in an embodiment of this application;

[0039] Figure 9 This is a flowchart illustrating another method for manufacturing a display panel provided in an embodiment of this application;

[0040] Figures 10 to 12 This is a schematic diagram of another method for manufacturing a display panel provided in an embodiment of this application.

[0041] Explanation of reference numerals in the attached drawings: 100, display screen body; 101, display area; 102, non-display area; 200, optical adhesive layer; 210, middle part; 220, edge part; 230, first sub-adhesive layer; 240, second sub-adhesive layer; 300, cover plate; 400, reinforcing part; 401, first surface; 402, second surface; 403, first inclined surface; 404, second inclined surface; 405, third inclined surface; 406, third surface; 500, polarizer; X, first direction. Detailed Implementation

[0042] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] With the rapid development of smart wearable devices, smartwatches, smart bracelets, and other products have become indispensable electronic products in people's daily lives. These devices typically need to be waterproof to cope with liquid environments such as water and sweat that may be encountered during daily use. Among them, 5ATM (50-meter water resistance) is a common waterproof rating standard for smartwatches, requiring the device to withstand the pressure equivalent to a depth of 50 meters of water. However, in actual testing and application, the waterproof performance of the display module often becomes a technical bottleneck, especially under high pressure environments, where the optical adhesive layer between the display body and the cover plate is prone to delamination, air bubbles, and other problems, leading to a decrease in display quality or even water ingress.

[0046] In the 5ATM waterproof test, display device failures primarily manifested as screen body cracking and poor adhesion bubbles. External pressure acts directly on the cover plate, causing it to deform and transfer to the display body. When the stress exceeds the material's tolerance limit, the screen body cracks. When the cover plate deforms under high pressure, lateral shear stress is generated at the interface between the optical adhesive layer and the cover plate or display body. This shear stress causes localized peeling of the optical adhesive layer, forming bubbles. These bubbles not only affect the display effect but may also expand further, ultimately leading to ingress of the display device.

[0047] The mainstream solution in the industry is to improve the display device's resistance to deformation by increasing the thickness of the cover plate. This method works by increasing the rigidity of the material to resist external pressure, thereby reducing cover plate deformation. However, the demand for thinner and lighter designs in smart wearable devices is increasingly strong, and increasing the cover plate thickness would directly lead to an increase in the overall thickness of the display device, which goes against market demand. Thicker materials not only increase material costs but may also increase manufacturing complexity.

[0048] To address the aforementioned issues, this application proposes a display device that enhances localized resistance to deformation by introducing reinforcing material into the edge region of the optical adhesive layer, rather than by increasing the overall thickness. This method effectively suppresses edge shear stress while maintaining the module's thinness and lightness.

[0049] like Figure 1 and Figure 2 As shown, a display device provided in the first aspect of this application includes: a display screen body 100, an optical adhesive layer 200, a cover plate 300, and a reinforcing portion 400. The display screen body 100 includes a display side and a non-display side disposed opposite each other along a first direction X. The optical adhesive layer 200 is disposed on the display side of the display screen body 100, and the optical adhesive layer 200 includes a middle portion 210 and an edge portion 220 disposed on the peripheral side of the middle portion 210 perpendicular to the first direction X. The cover plate 300 is disposed on the side of the optical adhesive layer 200 away from the display screen body 100. The optical adhesive layer 200 is bonded to the display side of the display screen body 100; at least a portion of the reinforcing portion 400 is fitted into the edge portion 220 of the optical adhesive layer 200, and the orthographic projection of the reinforcing portion 400 on the cover plate 300 and the orthographic projection of the edge portion 220 on the cover plate 300 at least partially overlap. The reinforcing portion 400 is disposed on at least one side of the middle portion 210 along the first direction X, and along the direction away from the middle portion 210, the thickness of the reinforcing portion 400 gradually increases along the first direction X, and the hardness of the material of the reinforcing portion 400 is greater than the hardness of the material of the optical adhesive layer 200.

[0050] In this embodiment, the display screen body 100 includes a display side and a non-display side disposed opposite to each other along the first direction X. The display screen body 100 emits light toward the display side. An optical adhesive layer 200 is disposed on the display side of the display screen body 100. A cover plate 300 is bonded to the display side of the display screen body 100 through the optical adhesive layer 200. The cover plate 300 is used to protect the display side of the display screen body 100.

[0051] At least a portion of the reinforcing portion 400 is fitted into the edge portion 220 of the optical adhesive layer 200, thereby reducing the impact of the reinforcing portion 400 on the thickness of the display device along the first direction X. The hardness of the material of the reinforcing portion 400 is greater than that of the material of the optical adhesive layer 200. The reinforcing portion 400 is disposed on at least one side of the middle portion 210 perpendicular to the first direction X. Along the direction away from the middle portion 210, the thickness of the reinforcing portion 400 gradually increases along the first direction X. When the display device is under pressure, the reinforcing portion 400 guides the deformation direction of the optical adhesive layer 200 to concentrate towards the middle region, reducing the shear stress concentration of the edge portion 220, improving the shear resistance of the edge portion 220, thereby reducing the risk of bubbles forming due to peeling between the optical adhesive layer 200 and the cover plate 300, improving the waterproof performance of the display device, and improving the usability of the display device.

[0052] Optionally, the material of the optical adhesive layer 200 may include polyurethane acrylate, methacrylate copolymer, or polydimethylsiloxane crosslinked network, etc.

[0053] like Figure 1 As shown, in some optional embodiments, the reinforcement 400 is disposed on the periphery of the middle portion 210 along the direction perpendicular to the first direction X.

[0054] In these alternative embodiments, the edge portion 220 is disposed on the periphery of the middle portion 210 along the first direction X, and the reinforcing portion 400 is fitted into the edge portion 220. The reinforcing portion 400 is disposed on the periphery of the middle portion 210 along the first direction X, thereby reducing the risk of bubbles being generated by peeling between the periphery of the optical adhesive layer 200 and the cover plate 300, thereby improving the waterproof performance of the display device.

[0055] Optional, such as Figure 3 As shown, the orthographic projection of the reinforcing part 400 on the cover plate 300 is annular. The reinforcing part 400 surrounds the optical adhesive layer 200 and can resist pressure deformation from all directions underwater. This reduces the problem of peeling and bubble generation between the optical adhesive layer 200 and the cover plate 300 caused by local stress concentration, and significantly improves the overall structural stability of the display module.

[0056] The reinforcing section 400 has a wedge-shaped cross-section. Along the direction away from the middle section 210, the thickness of the reinforcing section 400 gradually increases in the first direction X. This gradually increasing thickness design, combined with the annular layout, effectively guides the deformation direction of the optical adhesive layer 200 under pressure towards the middle section 210, reducing the uneven distribution of shear stress at the edge section 220 and further enhancing the bonding reliability between the optical adhesive layer 200 and the cover plate 300. The surrounding reinforcing section 400 forms a continuous reinforcing band at the edge of the optical adhesive layer 200, improving mechanical strength and creating a sealing barrier between the cover plate 300 and the display screen body 100, reducing the risk of water or sweat infiltration and extending the service life of the display device.

[0057] Compared to the thickened cover plate 300, the reinforcement 400 only needs to be locally reinforced at the edge 220. This improves the waterproof performance of the display device while maintaining its slim and lightweight characteristics to the maximum extent, thus meeting the requirements of smart wearable devices for a compact structure.

[0058] like Figure 1 and Figure 2 As shown, in some optional embodiments, the display screen body 100 includes a display area 101 and a non-display area 102 disposed on the periphery of the display area 101 along a direction perpendicular to the first direction X. The orthographic projection of the reinforcing part 400 on the cover plate 300 is spaced apart from the orthographic projection of the display area 101 on the cover plate 300.

[0059] In these optional embodiments, the orthographic projection of the reinforcing part 400 on the cover plate 300 does not overlap with the orthographic projection of the display area 101 on the cover plate 300, thereby reducing the obstruction of the display area 101 by the reinforcing part 400, reducing problems such as color shift or uneven brightness of the display device, and improving the display effect of the display device.

[0060] Optional, such as Figure 1 and Figure 2 As shown, the orthographic projection of the non-display area 102 on the cover plate 300 and the orthographic projection of the reinforcing part 400 on the cover plate 300 at least partially overlap, thereby increasing the screen ratio of the display device and reducing the bezel size of the display device.

[0061] like Figure 2 As shown, in some alternative embodiments, the reinforcement 400 is disposed on the edge portion 220 on the side facing the display body 100.

[0062] In these optional embodiments, the reinforcement 400 is located at the interface between the optical adhesive layer 200 and the display body 100. The reinforcement 400 can increase the structural rigidity of the display body 100, reduce the degree of deformation of the display body 100 under external pressure, thereby reducing the risk of peeling between the display body 100 and the optical adhesive layer 200 and improving the waterproof performance of the display device. The reinforcement 400 forms a protective barrier on the stress transmission path, reducing the transmission of deformation stress to the display area 101 and reducing the amount of deformation of the display body 100.

[0063] When the reinforcing part 400 is disposed on the side of the optical adhesive layer 200 facing the display screen body 100, the distance between the reinforcing part 400 and the display screen body 100 is small, which can reduce the interference of the reinforcing part 400 on the display light path, and also reduce the leakage of large-angle light from the display screen body 100 from the edge of the display device, thereby improving the performance of the display device.

[0064] Optional, such as Figure 2As shown, the reinforcing part 400 includes a first surface 401 facing the display body 100. The first surface 401 is attached to the display body 100. The attachment of the first surface 401 to the display body 100 increases the structural compactness and sealing between the display body 100 and the reinforcing part 400, thereby improving the waterproof performance of the display device.

[0065] like Figure 2 As shown, in some optional embodiments, the reinforcing part 400 further includes a second surface 402 on the side opposite to the middle part 210 and a first inclined surface 403 connected between the first surface 401 and the second surface 402. The first inclined surface 403 is bonded to the optical adhesive layer 200 and is inclined in the direction away from the middle part 210 along the direction close to the cover plate 300.

[0066] In these optional embodiments, the close adhesion between the first inclined surface 403 and the optical adhesive layer 200 forms a gradient stress transmission channel. The angle between the first inclined surface 403 and the first surface 401 is 30 degrees to 60 degrees, and can be 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, etc. The second surface 402 is located on the side of the reinforcing part 400 away from the middle part 210. The first inclined surface 403 connects the first surface 401 and the second surface 402. The cross-section of the reinforcing part 400 parallel to the first direction X is triangular, thereby enhancing the structural strength of the reinforcing part 400, improving the bending resistance of the reinforcing part 400, and reducing the deformation of the reinforcing part 400 under external force.

[0067] like Figure 1 and Figure 2 As shown, in some optional embodiments, the second surface 402 is parallel to the first direction X, and the orthographic projection of the edge portion 220 on the cover plate 300 overlaps with the orthographic projection of the reinforcing portion 400 on the cover plate 300.

[0068] In some embodiments, the reinforcing portion 400 protrudes from the optical adhesive layer 200 in a direction away from the middle portion 210, resulting in a larger bezel size for the display device and affecting the viewing experience. However, in some optional embodiments of this application, the second surface 402 is parallel to the first direction X, and the orthographic projection of the edge portion 220 on the cover plate 300 overlaps with the orthographic projection of the reinforcing portion 400 on the cover plate 300, which helps to reduce the bezel size of the display device and thus facilitates the realization of an ultra-narrow bezel.

[0069] like Figure 4 As shown, in some alternative embodiments, the edge portion 220 is located on both sides of the reinforcement portion 400 along the first direction X.

[0070] In these optional embodiments, the reinforcing portion 400 is located at the center of the optical adhesive layer 200 along the first direction X, and the reinforcing portion 400 can reduce the deformation of the edge portion 220. When the display device is in an underwater environment, when the cover plate 300 and the display screen body 100 are subjected to water pressure, the cover plate 300 and the display screen body 100 bend towards the optical adhesive layer 200, thus compressing the optical adhesive layer 200. Along the direction away from the middle portion 210, the thickness of the reinforcing portion 400 gradually increases along the first direction X. When the cover plate 300 and the display screen body 100 are compressed towards the optical adhesive layer 200, the reinforcing portion 400 guides the deformation direction of the optical adhesive layer 200 to concentrate towards the middle region, reducing the shear stress concentration of the edge portion 220, improving the shear resistance of the edge portion 220, thereby reducing the risk of bubbles forming due to peeling between the optical adhesive layer 200 and the cover plate 300, and improving the waterproof performance of the display device.

[0071] like Figure 4 As shown, in some alternative embodiments, the reinforcement 400 includes a second inclined surface 404 facing the side of the cover plate 300, and the second inclined surface 404 is inclined in a direction away from the middle portion 210 along the direction close to the cover plate 300.

[0072] In these optional embodiments, the close adhesion between the second inclined surface 404 and the optical adhesive layer 200 forms a stress transmission channel. The second inclined surface 404 is inclined away from the middle portion 210. The reinforcing portion 400 guides the deformation direction generated by the cover plate 300 pressing the optical adhesive layer 200 towards the middle region, thereby improving the shear resistance of the edge portion 220. Optionally, the angle between the second inclined surface 404 and the first direction X is 30 degrees to 60 degrees, and the angle between the second inclined surface 404 and the first direction X can be 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, etc.

[0073] like Figure 4 As shown, in some optional embodiments, the reinforcement 400 further includes a third inclined surface 405 facing the side of the display body 100, and the third inclined surface 405 is inclined in a direction away from the middle portion 210 along the direction close to the display body 100.

[0074] In these alternative embodiments, the close fit between the third inclined surface 405 and the optical adhesive layer 200 forms a stress transmission channel. The third inclined surface 405 is inclined in a direction away from the middle portion 210. The reinforcing portion 400 guides the deformation direction of the pressure applied by the display screen body 100 to the optical adhesive layer 200 to concentrate towards the middle region, thereby improving the shear resistance of the edge portion 220.

[0075] Optionally, the angle between the third inclined plane 405 and the first direction X is 30 degrees to 60 degrees, and the angle between the third inclined plane 405 and the first direction X can be 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, etc.

[0076] like Figure 4 As shown, in some optional embodiments, the reinforcing portion 400 further includes a third surface 406 on the side opposite to the middle portion 210. The third surface 406 is connected between the second inclined surface 404 and the third inclined surface 405. The third surface 406 is parallel to the first direction X. The orthographic projection of the edge portion 220 on the cover plate 300 overlaps with the orthographic projection of the reinforcing portion 400 on the cover plate 300.

[0077] In these optional embodiments, the third surface 406 connects the second inclined surface 404 and the third inclined surface 405, and the cross-section of the reinforcing portion 400 parallel to the first direction X is triangular, thereby enhancing the structural strength of the reinforcing portion 400, improving its bending resistance, reducing the deformation of the reinforcing portion 400 under external force, and thus reducing the deformation of the optical adhesive layer 200. In some embodiments, the reinforcing portion 400 protrudes from the optical adhesive layer 200 in a direction away from the middle portion 210, resulting in a larger bezel size for the display device and affecting the visual appeal. In some optional embodiments of this application, the third surface 406 is parallel to the first direction X, and the orthographic projection of the edge portion 220 on the cover plate 300 overlaps with the orthographic projection of the reinforcing portion 400 on the cover plate 300, which helps to reduce the bezel size of the display device, thereby facilitating the realization of an ultra-narrow bezel.

[0078] like Figure 4 As shown, in some optional embodiments, a polarizer 500 is provided on the side of the display body 100 facing the optical adhesive layer 200 and the reinforcing portion 400.

[0079] In these alternative embodiments, the polarizer 500 is used to reduce the reflectivity of the display device under ambient light. The polarizer 500 is connected between the optical adhesive and the display body 100. The optical adhesive layer 200 is bonded between the polarizer 500 and the cover plate 300. The optical adhesive layer 200 can encapsulate the side of the polarizer 500 facing the cover plate 300, reducing the entry of water, oxygen, etc. into the display body 100 through the edge of the polarizer 500, thereby improving the reliability of the display device.

[0080] In some alternative embodiments, the material of the reinforcing part 400 includes at least one of glass, plastic or organic adhesive.

[0081] In these optional embodiments, the glass material has a Young's modulus of approximately 70 GPa, providing good resistance to deformation and reducing the risk of delamination between the optical adhesive layer 200 and the cover plate 300 and the display body 100. The glass also has a longer service life, which helps improve the reliability of the display device. When the reinforcing part 400 is made of glass, the glass reinforcing part 400 can be made of 0.1mm ultra-thin tempered glass, thereby reducing the impact of the reinforcing part 400 on the thickness of the display device.

[0082] The plastic can be engineering plastic, such as polyetheretherketone (PEEK) and polyimide. While maintaining high strength, the plastic is lightweight, which helps reduce the overall weight and improve performance when the display device is a smartwatch or wristband. The plastic reinforcement part 400 can reduce the production cost of the display device. The plastic material reinforcement part 400 solution supports injection molding, which helps improve the production efficiency of the display device.

[0083] The material of the reinforcing part 400, including the organic adhesive, can improve the impact resistance and shear resistance of the optical adhesive layer 200. The organic adhesive material is compatible with existing coating equipment, which is beneficial to improving the production efficiency of the display device and reducing production costs.

[0084] The reinforcing part 400 is made of at least one of glass, plastic or organic adhesive, which can be flexibly selected according to the application scenario of the display device. Glass, plastic and organic adhesive have good corrosion resistance, and when the display device is a smart wearable device, it can effectively resist corrosion from sweat or water.

[0085] Optionally, the Young's modulus of the reinforcing portion 400 is greater than that of the optical adhesive layer 200. The Young's modulus of the reinforcing portion 400 can be from 5 GPa to 70 GPa, which is significantly higher than that of the optical adhesive layer 200 (0.1 GPa to 1 GPa). The high-modulus reinforcing portion 400 can withstand more external loads.

[0086] like Figures 1 to 4As shown, in some optional embodiments, the display device includes: a display screen body 100, an optical adhesive layer 200, a cover plate 300, a polarizer 500, and a reinforcing portion 400. The display screen body 100 includes a display side and a non-display side disposed opposite each other along a first direction X. The polarizer 500 is disposed on the display side of the display screen body 100. The optical adhesive layer 200 is disposed on the side of the polarizer 500 facing away from the display screen body 100. The cover plate 300 is disposed on the side of the optical adhesive layer 200 facing away from the display screen body 100. The cover plate 300 is bonded to the polarizer 500 through the optical adhesive layer 200. The optical adhesive layer 200 includes... The display screen 100 includes a middle portion 210 and an edge portion 220 disposed on the periphery of the middle portion 210 along a direction perpendicular to the first X. A reinforcing portion 400 is fitted into the edge portion 220 of the optical adhesive layer 200. The reinforcing portion 400 is disposed on the periphery of the middle portion 210 along a direction perpendicular to the first X. The orthographic projection of the reinforcing portion 400 on the cover plate 300 overlaps with the orthographic projection of the edge portion 220 on the cover plate 300. The orthographic projection of the reinforcing portion 400 on the cover plate 300 is annular. The reinforcing portion 400 surrounds the optical adhesive layer 200. The display screen body 100 includes a display area 101 and an edge portion 220 disposed on the display area 101 along a direction perpendicular to the first X. The non-display area 102 on the periphery, the orthographic projection of the reinforcing portion 400 on the cover plate 300 is spaced apart from the orthographic projection of the display area 101 on the cover plate 300. The orthographic projections of the non-display area 102 on the cover plate 300 and the orthographic projections of the reinforcing portion 400 on the cover plate 300 at least partially overlap. Along the direction away from the middle portion 210, the thickness of the reinforcing portion 400 gradually increases along the first direction X. The hardness of the material of the reinforcing portion 400 is greater than the hardness of the material of the optical adhesive layer 200. The reinforcing portion 400 is disposed on the side of the edge portion 220 facing the display screen body 100. The reinforcing portion 400 includes the side facing the display screen body 100. The first surface 401 on one side is attached to the polarizer 500. The reinforcing part 400 also includes a second surface 402 on the side away from the middle part 210 and a first inclined surface 403 connecting the first surface 401 and the second surface 402. The first inclined surface 403 is attached to the optical adhesive layer 200. Along the direction close to the cover plate 300, the first inclined surface 403 is inclined in the direction away from the middle part 210. The second surface 402 is parallel to the first direction X. The orthographic projection of the edge part 220 on the cover plate 300 overlaps with the orthographic projection of the reinforcing part 400 on the cover plate 300.Alternatively, the edge portion 220 is located on both sides of the reinforcing portion 400 along the first direction X. The reinforcing portion 400 includes a second inclined surface 404 facing the cover plate 300. Along the direction close to the cover plate 300, the second inclined surface 404 is inclined in a direction away from the middle portion 210. The reinforcing portion 400 also includes a third inclined surface 405 facing the display body 100. Along the direction close to the display body 100, the third inclined surface 405 is inclined in a direction away from the middle portion 210. The reinforcing portion 400 also includes a third surface 406 on the side away from the middle portion 210. The third surface 406 is connected between the second inclined surface 404 and the third inclined surface 405. The third surface 406 is parallel to the first direction X. The orthographic projection of the edge portion 220 on the cover plate 300 overlaps with the orthographic projection of the reinforcing portion 400 on the cover plate 300.

[0087] The second aspect of this application also provides a method for manufacturing a display device, such as... Figure 5 As shown, it includes:

[0088] Step S01: As Figure 6 As shown, an optical adhesive layer 200 and a reinforcing portion 400 are formed on the display side of the display body 100 along the first direction X. The optical adhesive layer 200 includes a middle portion 210 and an edge portion 220 disposed on the peripheral side of the middle portion 210 perpendicular to the first direction X. At least a portion of the reinforcing portion 400 is fitted into the edge portion 220 of the optical adhesive layer 200. Along the direction away from the middle portion 210, the thickness of the reinforcing portion 400 gradually increases along the first direction X. The hardness of the material of the reinforcing portion 400 is greater than the hardness of the material of the optical adhesive layer 200.

[0089] Step S02: As Figure 2 As shown, the cover plate 300 is attached to the side of the optical adhesive layer 200 away from the display screen body 100.

[0090] In this embodiment, the display screen body 100 includes light emitting along the first direction X toward the display side. An optical adhesive layer 200 is disposed on the display side of the display screen body 100. A cover plate 300 is bonded to the display side of the display screen body 100 through the optical adhesive layer 200, and the cover plate 300 is used to protect the display side of the display screen body 100. At least a portion of the reinforcing portion 400 is fitted into the edge portion 220 of the optical adhesive layer 200, thereby reducing the influence of the reinforcing portion 400 on the thickness of the display device along the first direction X. The material of the reinforcing part 400 has a higher hardness than the material of the optical adhesive layer 200. The reinforcing part 400 is disposed on the periphery of the middle part 210 along the direction perpendicular to the first direction X. Along the direction away from the middle part 210, the thickness of the reinforcing part 400 gradually increases along the first direction X. When the display device is subjected to pressure, the reinforcing part 400 guides the deformation direction of the optical adhesive layer 200 to concentrate towards the middle area, reducing the shear stress concentration of the edge part 220, improving the shear resistance of the edge part 220, thereby reducing the risk of bubbles being generated by the peeling between the optical adhesive layer 200 and the cover plate 300, and improving the waterproof performance of the display device.

[0091] In some alternative embodiments, in step S01, such as Figure 7 As shown, it includes:

[0092] Step S011: As Figure 8 As shown, a reinforcing portion 400 is formed on the display side of the display body 100.

[0093] Step S012: As Figure 6 As shown, an optical adhesive layer 200 is formed on the display side of the display body 100 and on the side of the reinforcing part 400 away from the display body 100.

[0094] In these alternative embodiments, a reinforcing portion 400 is formed on the display side of the display body 100, and the reinforcing portion 400 is bonded to the display side of the display body 100 using a bonding process. Subsequently, an optical adhesive layer 200 is formed on the display side of the display body 100 and on the side of the reinforcing portion 400 away from the display body 100. The optical adhesive layer 200 covers the reinforcing portion 400 and at least a portion of the display body 100 exposed by the reinforcing portion 400.

[0095] The reinforcing part 400 is located at the interface between the optical adhesive layer 200 and the display screen body 100. The reinforcing part 400 can increase the structural rigidity of the display screen body 100, reduce the degree of deformation of the display screen body 100 under external pressure, thereby reducing the risk of peeling between the display screen body 100 and the optical adhesive layer 200 and improving the waterproof performance of the display device. The reinforcing part 400 forms a protective barrier on the stress transmission path, reducing the transmission of deformation stress to the display area 101 and reducing the amount of deformation of the display screen body 100.

[0096] When the reinforcing part 400 is disposed on the side of the optical adhesive layer 200 facing the display screen body 100, the distance between the reinforcing part 400 and the display screen body 100 is small, which can reduce the interference of the reinforcing part 400 on the display light path, and also reduce the leakage of large-angle light from the display screen body 100 from the edge of the display device, thereby improving the performance of the display device.

[0097] Optionally, the reinforcing part 400 includes a first surface 401 facing the display body 100. The first surface 401 is attached to the display body 100. The attachment of the first surface 401 to the display body 100 increases the structural compactness and sealing between the display body 100 and the reinforcing part 400, thereby improving the waterproof performance of the display device.

[0098] In some alternative embodiments, in step S01, such as Figure 9 As shown, it includes:

[0099] Step S013: As Figure 10 As shown, a first sub-adhesive layer 230 is formed on the display side of the display body 100.

[0100] Step S014: As Figure 11 As shown, a reinforcing portion 400 is formed on the side of the first sub-adhesive layer 230 away from the display screen body 100.

[0101] Step S015: As Figure 12 As shown, a second sub-adhesive layer 240 is formed on the side of the first sub-adhesive layer 230 and the reinforcing portion 400 away from the display screen body 100, and the first sub-adhesive layer 230 and the second sub-adhesive layer 240 constitute the optical adhesive layer 200.

[0102] In these optional embodiments, the optical adhesive layer 200 includes a first sub-adhesive layer 230 and a second sub-adhesive layer. The first sub-adhesive layer 230 is located on the side of the second sub-adhesive layer 240 facing the display body 100. The first sub-adhesive layer 230 is first formed on the display side of the display body 100, and then a reinforcing portion 400 is formed on the side of the first sub-adhesive layer 230 away from the display body 100. Then, the second sub-adhesive layer 240 is formed on the side of the first sub-adhesive layer 230 and the reinforcing portion 400 away from the display body 100. The reinforcing portion 400 is located in the middle of the optical adhesive layer 200 along the first direction X, that is, the reinforcing portion 400 is located between the first sub-adhesive layer 230 and the second sub-adhesive layer 240. The reinforcing portion 400 can reduce the deformation of the edge portion 220. When the display device is in an underwater environment, when the cover plate 300 and the display body 100 are subjected to water pressure, the cover plate 300 and the display body 100 bend towards the optical adhesive layer 200, thus compressing the optical adhesive layer 200. Along the direction away from the middle portion 210, the thickness of the reinforcing portion 400 gradually increases along the first direction X. When the cover plate 300 and the display screen body 100 are pressed towards the optical adhesive layer 200, the reinforcing portion 400 guides the deformation direction of the optical adhesive layer 200 to concentrate towards the middle area, reducing the shear stress concentration of the edge portion 220, improving the shear resistance of the edge portion 220, thereby reducing the risk of bubbles being generated by the peeling between the optical adhesive layer 200 and the cover plate 300, reducing the risk of bubbles being generated by the peeling between the optical adhesive layer 200 and the display screen body 100, and improving the waterproof performance of the display device.

[0103] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display device, characterized in that, include: A display screen body, the display screen body including a display side and a non-display side disposed opposite to each other along a first direction; An optical adhesive layer is disposed on the display side of the display screen body, and the optical adhesive layer includes a middle portion and an edge portion disposed on the circumferential side of the middle portion perpendicular to the first direction; A cover plate is disposed on the side of the optical adhesive layer away from the display screen body, and the cover plate is bonded to the display side of the display screen body through the optical adhesive layer; The reinforcing portion, at least a portion of which is fitted into the edge portion of the optical adhesive layer, has its orthographic projection on the cover plate at least partially overlapping with the orthographic projection of the edge portion on the cover plate. The reinforcing portion is disposed on at least one side of the middle portion perpendicular to the first direction, and in a direction away from the middle portion. The thickness of the reinforcing portion gradually increases along the first direction. The hardness of the material of the reinforcing portion is greater than the hardness of the material of the optical adhesive layer.

2. The display device according to claim 1, characterized in that, The reinforcing portion is disposed on the periphery of the middle portion along a direction perpendicular to the first direction; Preferably, the display screen body includes a display area and a non-display area disposed on the periphery of the display area perpendicular to the first direction, and the orthographic projection of the reinforcing part on the cover plate is spaced apart from the orthographic projection of the display area on the cover plate.

3. The display device according to claim 1, characterized in that, The reinforcing part is disposed on the edge portion facing the display screen body; Preferably, the reinforcing portion includes a first surface facing the side of the display body, the first surface being disposed in close contact with the display body.

4. The display device according to claim 3, characterized in that, The reinforcing part further includes a second surface on the side away from the middle part and a first inclined surface connecting the first surface and the second surface. The first inclined surface is bonded to the optical adhesive layer and is inclined in the direction away from the middle part along the direction close to the cover plate. Preferably, the second surface is parallel to the first direction, and the orthographic projection of the edge portion on the cover plate overlaps with the orthographic projection of the reinforcing portion on the cover plate.

5. The display device according to claim 1, characterized in that, The edge portion is located on both sides of the reinforcing portion along the first direction; Preferably, the reinforcing portion includes a second inclined surface facing one side of the cover plate, and the second inclined surface is inclined in a direction away from the middle portion along the direction close to the cover plate.

6. The display device according to claim 5, characterized in that, The reinforcing part further includes a third inclined surface facing the side of the display screen body, and the third inclined surface is inclined in a direction away from the middle part along the direction close to the display screen body; Preferably, the reinforcing portion further includes a third surface on the side opposite to the middle portion, the third surface being connected between the second inclined surface and the third inclined surface, the third surface being parallel to the first direction, and the orthographic projection of the edge portion on the cover plate overlapping the orthographic projection of the reinforcing portion on the cover plate.

7. The display device according to any one of claims 1-6, characterized in that, A polarizer is provided on the side of the display screen facing the optical adhesive layer and the reinforcing part; Preferably, the material of the reinforcing part includes at least one of glass, plastic or organic adhesive; Preferably, the Young's modulus of the reinforcing portion is greater than the Young's modulus of the optical adhesive layer.

8. A method for manufacturing a display device, characterized in that, include: An optical adhesive layer and a reinforcing portion are formed on the display side of the display body along a first direction. The optical adhesive layer includes a middle portion and an edge portion disposed on the peripheral side of the middle portion perpendicular to the first direction. At least a portion of the reinforcing portion is fitted into the edge portion of the optical adhesive layer. Along the direction away from the middle portion, the thickness of the reinforcing portion gradually increases along the first direction. The hardness of the material of the reinforcing portion is greater than the hardness of the material of the optical adhesive layer. The cover plate is attached to the side of the optical adhesive layer opposite to the display screen body.

9. The method for manufacturing a display device according to claim 8, characterized in that, The step of forming an optical adhesive layer and a reinforcing portion on the display side of the display body along the first direction includes: The reinforcing portion is formed on the display side of the display screen body; The optical adhesive layer is formed on the display side of the display body and on the side of the reinforcing portion opposite to the display body.

10. The method for manufacturing a display device according to claim 8, characterized in that, The step of forming an optical adhesive layer and a reinforcing portion on the display side of the display body along the first direction includes: A first sub-adhesive layer is formed on the display side of the display screen body; The reinforcing portion is formed on the side of the first sub-adhesive layer opposite to the display screen body; A second sub-adhesive layer is formed on the side of the first sub-adhesive layer and the reinforcing portion away from the display screen body, and the first sub-adhesive layer and the second sub-adhesive layer constitute the optical adhesive layer.

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